What is the average necklace size for a woman?

The average necklace size for a woman is 18 inches. Necklaces of this length are princess-length or princess necklaces, and they typically fall right at the collarbone, so they can work well with many types of necklines. Princess-length necklaces are also a popular choice for pendant necklaces due to this length. Shop a wide range of necklaces on 1stDibs.